List of top Physics Questions asked in JKCET

The kinetic energy of electron and photon arc the same. The relation between their De - Broglie wavelengths $ \lambda _e $ and $ \lambda _p $ is
A solid cylinder of mass $ M $ and radius $ R $ rolls on a flat surface. Find its moment of inertia about the line of contact.
An extrinsic semiconductor with electrons as majority carriers can be obtained by doping $ Ge $ or $ Si $ with
The difference between the maximum and minimum values of resistance of a resistor with the color scheme green-green-red-silver is
Which of the following is the indirect way of generating $ FM $ ?
A resistance of $ 5 \Omega $ is connected in series with a capacitance of $ 1\,mF $ . The combination is connected to $ AC $ source of angular frequency $ 200 \, rad\, s ^{-1} $ . Then
A body $ A $ thrown vertical upwards with a velocity v reaches a height of $ 200\, m $ . Another body $ B $ whose mass is twice that of $ A $ is thrown with a velocity $ 2v $ . Find the maximum height reached by $ B $ .
Amplitude modulation is the process of
The absolute temperature of a gas is increased to $ 16 $ times of the original temperature. The rms speed of its molecules will become
When a simple pendulum is moved from the Earth's surface to deep mine, the period of oscillation
$ n $ identical capacitors are joined in parallel and charged to a potential $ V $ . The charged capacitors are disconnected and then connected in series using insulating handles such that the positive plate of one is connected to the negative plate of the other. The potential difference across the free plates of the combination is
A converging lens has a focal length of $ 0.12\, m $ . To get an image of unit magnification the object should be placed at what distance from the converging lens?
A bird flies at an angle of $ 60^{\circ} $ to the horizontal. Its horizontal component of velocity is $ 10\, m\, s ^{-1} $ . Find the vertical component of velocity in $ m s ^{-1} $ .
A very long conductor carries a current of $ 1 A $ . The magnetic field at a point whose distance is $ 0.1\, m $ from one end of the conductor is (in $ T $ )
A projectile is fired at an angle of $ 45^{\circ} $ and reaches the highest point in its path after $ 2\sqrt2\,s $ . Find the velocity of projectile in $ m s ^{-1} $ ,
A body of mass $ 5 \,kg $ acquires an angular acceleration of $ 10\, rad\, s^{-2} $ by an applied torque of $ 2 \,N m $ . Find its radius of gyration.
The motion of a particle is represented by the equation $ S = 8t^3 - 2t^2+ 6t + 7 $ . Find the velocity of the particle at the end of $ 2 $ seconds in $ m s^{-1} $
In a Young?s double slit experiment, the two slits which are separated by $ 1.2\, mm $ are illuminated with a monochromatic light of wavelength $ 6000 $ angstorm. The interference pattern is observed on a screen placed at a distance of $ 1m $ from the slits. Find the number of bright fringes formed over $ 1 \,cm $ width on the screen.
A particle moves with a uniform speed $ v $ and time period $ T $ in a circular path of radius $ r $ . If the speed of the particle is doubled, its new time period is
The kinetic energy of a particle executing simple harmonic motion is $ 1/6^{th} $ of its maximum value at a distance of $ 5 \,cm $ from its equilibrium position. The amplitude of its motion is
In a moving coil galvanometer, the coil having $ 500 $ turns and an average area of $ 4 \,cm^{2} $ carries a current of $ 0.1 \,A $ and is set parallel to a magnetic field with a torque of $ 0.15\, N \,m $ . The strength of the magnetic field is
An organ pipe open at both ends has fundamental frequency $ f $ in air. If the pipe is dipped vertically in water such that $ 1/4^{th} $ of its length is inside water, then the fundamental frequency of the air column in it is
The operating point of transistor amplifier should be in
The electric flux passing through $a$ cube of side $ a $ , which holds a charge $ q $ at one of its corners is
For a thin lens with radii of curvatures and $ R_{1} $ and $ R_{2} $ , refractive index $ n $ and focal length $ f $ , the factor $ \left(\frac{1}{R_{1}}-\frac{1}{R_{2}}\right) $ is equal to